| http://www.w3.org/ns/prov#value | - and wherein g7 i, which may be the same or different, are each an ester, ether, amide, imide, urethane, urea, silylether or carbonyl linkage, and G7 is a polyvalent group containing an unsaturated hydrocarbon or hetero atom, i is an integer of 1 to 5 and k is an integer of 2 to 500.
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